Incandescent-lamp system.



Y. KAWASAKI.

INGANDBSGENT LAMP SYSTEM.

APPLICATION FILED JULY 28. 1908.

962,435, Patented June 28, 1910.

I I an-venboz wi lmwoeo Yasulreflilwaaakl- M02541;

TASUK E KAWASAKI, OI VANGOUVER, BRITISH COLUMBIA, CANADA.

INCANDESGENT-LA MP SYSTEM.

Bpe'eiQc'atlon of Letters Patent. Patented June 28, 1910. Application filed. Jilly 28, 19U8. Serial N0. 445,808. 7

To all wh mit may concern:

Be it known that I, YASUKE KAwAsAKI, sub'ect of the Emperor of Japan, residing at ancouver, inthe-Province of British Columbia, Canada, have invented a new and useful Improvement in Incandescent Lamp Systems, of which the following is a specification I This invention relates to an incandescent lamp circuit and to the combination there with of a lampwhich with the same voltage will emit various candle powers of light,while the amperage of the current used willvary only according to the candle power of illu inination used. This object I attain'by providing a lamp having two or more filaments of difierent sizes togive with the same. ,voltage various candle owers of light and by providing means w ereby the current may be passed in parallel through any one or other or group ofthe filaments of the lamp or lamps in the circuit. I

The invention is particularly described in -the following specification, reference being rent may pass as desired through them.

made'to the drawing by which it is accompanied which is a diagrammatic representation of a circuit showing the connection of the filaments of onelamp therein to the several wires ofthe circuit and to themeans for connecting these several wires that the. cur- In these drawings 8 represents an incandescent lamp bulbhaving threefilaments 2 6 and 10 of diflt'erent candle powers which may be assumed as indicatedby their initial" figures, via, a two candle power filament, a sixcandle power filament and a ten candle power filament. One end of each filament is connected at 5 to the positive wire 3 of the circuit and the other end of each filament is connectedres ctively to separate negative wires 2, 6 an 10, which reference fi ures are selected asbeing numerically m-v amount of incandescence or power of dlcative of the assumed-candle power of the filaments to which they are connected; With this provision of filaments in the lamp and manner of connecting the circuit wires there to, the current may 'be passed in parallel through any one ,or other or any combined p which the current is passed will be rendered fully incandescent while the amperage of the current used will be proportionate to the illuminating .the lamp;

' The current maybe directed pass hereby declare that what of the filaments and ,those through through any desired filament or oup of filaments by a circuit changer, i ustrated in the lower part of the diagram,'which circuit changer consists of a contact arm 7 to the axis of which the negative wire 4 of the external circuit is connected and thisarm is susceptible of pivotal movement over ase ries of contacts forming the terminals of the negative wires 2, 6 and 10 of the lamp circuit. These terminal-contacts are arranged concentrically singly and in groups to be successively engaged by theend' of the contact arm 7 which may thus be placed to connect thevarious negative wires of the lamp circuit to the negative wire 4 of the external circuit.

Starting at sition the current is entirely cut ofi from the lamp circuit, the contact arm 7 may be moved tothe terminal of 2 when the current will pass only through the smallest filament 2 of the lamp or lamps in the circuit, or to I v thatflof 6 or ,of-lO or to those of the groups 2 and 6 or 2 and 10 or 6 and 10 or to 2,.6 and 10. With this system a single lamp having two forth three diflerent candle powers, and a lamp having three filaments, asillustrated 1n the diagram, may be varied to give seven difierent candle powers and being connected in parallel the glow of the filaments Wlll'bG equaland the amperes of the current used will be'directly proportioned to the candle power used.

The advantage of this arrangement is obvious in the facility it gives for varying the t degree of illumination of a group of incandescent lamps without cutting out individual lamps which in a chandelier spoils the effect. It may also be advantageously used for the rooms and corridors of hotels and publlc buildings where it may be desired to increase or reduce the illumination at any particular time.- v

'I-Iaving now particularly described my invention and the manner of its application,- I I I claim as new and desire to be protected in by Letters Patent, 1s: 1. In an incandescent lamp system, the

the-zero point 0 in'which podifferent sized filaments may be made to give combination with a lamp having a plurallty wires being connected with the common terminal of said filaments, a circult controller of filaments which have one common ter-i "minal, a air of line wgres connected w1th a source 0 electric energy, one of said line having a movable arm connected to the other line wlre, said circuit controller including a plurality of sets of contacts, certain of said sets of contacts consisting of a single contact member others of said sets of contacts consisting 0% two contact members and another of said sets of contacts consisting of three contact members, and electrical connections between one of said filaments and one of said single contact sets, electrical connections between said single contact set and one of the contacts of a double contact set,

' electrical connections between said single member and others 0 said sets of contactsconsisting of a double contact member and i still another of said sets of contacts consistmembers of a set bein ing of a triple contact member, the contact insulated from one another and said sets 0 contacts being insulated one set from another, electrical connections between one terminal of one of said filaments and one of the contact members of triple contact set, electrical connections between the same filament terminal and one of the contact members of one of said double contact sets, and electrical connections between the same filament terminal and one of said single contact member sets, and electrical connections between certain, of said other contacts and the respective filaments.

3. The combination with a lamp having a plurality of filaments each having a common terminal and adapted to be connected to one line wire from a source of electric energy, a circuit controller having a movable arm electrically connectible to another line wire from the source of electric energy, said circuit controller also includin a plurality of groups of contacts certain 0 said groups of contacts consisting of a single contact, another of said groups of contacts consistin of a plurality of contacts, the contacts 0 each group being separated from one another and those of one group being separated from those of the other groups, electrical connections between the free terminals of said filaments and certain of the contacts in certain of said groups, and said controller arm having a contacting portion to simultaneously enga c all of the contacts of a group, substantially as shown and described.

In testimony whereof I have signed my name to this specification in the presenceof two subscribing witnesses.

YASUKE KAWASAKI.

Witnesses:

ROWLAND BRrrrAIN, CLIVE S. CABMAN. 

